Biological packing

Biofilm is to make micro-organisms attached to the carrier surface
of the sewage flowing through the surface of micro-film attached to
the carrier in the process of adsorption by organic matter and
oxygen to the biofilm within the proliferation and membrane
bio-oxidation occurred in the role of decomposition of pollutants.

IntroductionBiofilm has many features: conducive to cell separation; reactor
can achieve a higher cell concentration; by optimizing the size of
feature vectors can achieve maximum microbial activity; provided
simultaneously in the same reactor, the possibility of a fixed
different kinds of microorganisms ; processing, high efficiency,
resistance to shock loading, small volume, easy operation and
management, troubled by activated sludge bulking problem can be
eliminated, can maintain a high sludge age, high microbial biomass,
hydraulic retention time is short and so on. As the microorganisms
are fixed on the carrier, the proliferation of nitrifying bacteria
may also slow growth and reproduction of microorganisms. Biofilm
biological phase is very rich, formed by bacteria, fungi and other
microbial groups, composed of a series of relatively stable
ecosystem. Biofilm wastewater treatment system is a key component
of the vector organisms - packing. The development of bio-filler
the natural sand and gravel from the past to the present polymer
organic materials. Commonly used in organic synthesis is currently
filling are: soft filler, semi-soft packing, flexible packing,
honeycomb-like packing. As a result there is some filler less
biofilm formation, organic matter and low processing efficiency
drawbacks. Severe constraints of biological filler in water
treatment engineering applications. Therefore, development of new
filler to study its application prospects in water treatment is the
current hot issue biofilm applied research.Biological filter media
are polypropylene-based polymers, and add fill, such as
hydrophobic, hydrophilic, flame resistance, heat resistance, frost
resistance, aging resistance, different additives, melt formed by
the filament Weld mesh with each other forming the overall
structure of the porous filler. Tsinghua University, Water
Pollution Control Equipment Quality Supervision and Inspection
Center, was hanging on their film and the treatment effect
experiments, concluded that "the biological filter media has a good
hanging membrane properties. In the bio-reactor packing can
significantly increase biomass and obtain good COD removal. "

Table 1 Biological parameters of packing specifications

Model

Dimensions(mm)

The number of internal water channel(A)

Water channel specifications（mm）

Porosity（%）

Filler surface area (m2/m3)

Lifea）

RCB-5225SW

500×250Length of arbitrary *

10

65×65

97~98

65~70

8~10

RCB-5225FW

500×250Length of arbitrary

10

65×65

97~98

75~85

8~10

RCB-5325SJ

500×250Length of arbitrary

36

25×25

96~97

120~140

8~10

Notice: The biological filter length according to the user
requirements. Model suffix means the production for FW iron fillers
are added to fill with a positive charge.2, physical characteristics